The results showed that high efficiency genotypesin tolerance to low NPK nutrients have higher NRA,chlorlphyll content and photosynthetic rate than low efficiency genotypes without fertilization.

• 结果表明，耐低NPK养分的高效基因型，在不施肥条件下具有较高的硝酸还原酶活性、叶绿素含量和光合速率，相对硝酸还原酶活性、相对叶绿素含量和相对光合速率也较高。